Circuit breaker



C. AALBORG CIRCUIT BREAKEH Original Filed Jan. 8. 1923 ,lini. A n

IVENTOR Chr/'.s/'an Aalborg Fly' Z' WW ATTQRN'EY Patented Feb. 5, 1929.

UNITED STATES rArsNr orner..

CHRISTIAN ALBORG, OF PITTSBURGH, PENNSYLVANI, SSIGNF, WSTINGHOUSE ELECTRIC 8c MANUFACTURING' COMPANY, CORPORATION 01? PENNSYLVANI.

crncurr antenna.

Application niet January a, 192s. serial ne. circus.

which a circuit interrupter is placed in each.

phase ci the circuit and the several associated circuit interrupters are placed in vertical alinement.

Another i ject of my invention is to provide a co on controlling means for tank litters used i connection with a plurality of circuit interruptrs placed in alinement.

It is also object of my invention to provide an arrangement of circuit interrupters and actuating means therefor, which require a minimum ci ticor space at the expense of the vertical space..

It is a further object of my'invention to provide, in an installation of circuit interrupters in vertical alinement and having a common means ior controlling movement therefor, means for preventing the operation of 'the controlling mechanism until the sev eral interrupters have been placed in their correct operating positions.

Still another object of my invention is to provide means for preventing the accidental movement of any one of a plurality of interconnectedcircuit interrupters until all of the interrupters are in their proper position for such, movement.

In my co-pending application Serial No. 611,258, tiled J an. 8, 1923, I have shown and described an arrangement of circuit interrupters in -which it is necessary to employ a large amount of shafting and in which it is necessary to have a tank lifter for each circuit interrupter. In the present invention, I propose to eliminate a4 large portion of the shafting and to provide a single interchangeable tank lifter for each floor of the power station, thereby materially reducing the amount of apparatus required in such a power ystation without reducing the advantages gained by the installation as a whole.

In the accompanying drawing,

Figure 1 is a sectional view of the several floors of a power station and a side elevation of circuit interrupters and litters embodying my inventionn Fig. 2 is a face view ot a wall of a power station embodying my invention.

Figz is an enlarged sectional vview oli single floor of a power station showing the details of my invention.

In the preferred embodiment oi my invention, a power station 1 having a plurality ci floors or levels 2, 3, d and 5, certain of which. support circuit interrupters ii, is equipped with portable tank litters 7 tor the simultaneous removal and disconnection oi' a plurality of circuit interrupters from an electrical cirn cuit. Vlhe tanlr litters are provided with common connecting means comprising a shaft 8, and gear mechanisms 9. .si motor 10, which is placed on the upper loor 2 in vertical alineinent with the series ot circuit interrupters 6 to be actuated, is operatively connected to the shai't 8 by means of bevel gear mechanism 1l.

This invention is applicable to any type of circuit interrupter. which consists of a tanlr 12, a cover 13 and suitable cover-retaining means. However, I prefer to employ the retaining means 14 illustrated herein and shown and described in my co-pending application, Serial No. 604,492, filed Dec. 2, 1922. The disconnecting mechanism 14 is permanently attached to beams 15 forming a part of the permanent structure of the power station 1. The tank 12 is provided with ears 16 which cooperate with levers 17, the latter forming part of the securing means lll.

A secondary partition 18 projects from the wall of the station 1 intermediate the fioors 2, 8, i and 5. These partitions support bushings 19 which form the 4fixed terminals for electric conductors 21. The contact members for each conductor 21 consist of a s ring 22 and a movable member 23, the latter eing a part of the circuit interrupter, whereby a disconnecting switch is obtained.

The lower faces of beams 15 are equipped with lianges 24 which co-operate with ianges 25 mounted on the tank 12 and lianges 25a attached to the cover members 13 for uroses to be hereinafter described. he anges 25a are of greater, diameter than the flanges 25.

' A portable tank lifter 7 of any suitable construction, is placed on each floor ci the power station, as is shown in Iiigure 2. Such a tank lifter consists ci a 2O and supporting frame 26, wheels 27 adgustable arms 28,

y the station wall.

The gear connection` 9 comprises support 35 having arms 36 and 37 in which is journaled a short shaft 38. A gear-wheel 39 is mounted on the shaft 38 between the arms 36 and 37, and has a geared connection to shaft 8. A collar is secured to shaft 38 immediately below the arm 37. This collar is provided with a notch 42 and a bevel gear face 43. A latch member 44 is pivotally supported, as at 45, on the arm 37 and is adapted to engage the notch 42-by force of gravity.

In practice it has been found advisable to place the circuit interrupters for the several polyphase circuits in vertical alinement thereby eliminating any cross-connecting mechanism, such as 1s essential to a horizon-4 tal disposition of circuit interrupters for a polyphase system, as is tbe customary practice.

In the operationy `of /my invention, the latches 44 normally tit into the notches 42 in collars 41, as is shown by the dotted line position of member 44 in Fig. 3. Because of the interconnection between the latch 44 and the notch 42, rotation of the shafts 8 and 38 is normally prevented. If any circuit interrupter 6 is to be repaired the lifter 7 on that floor is placed under the iiange Y25 and between' the beams 15. Movement of the lifter A9 into position causes the extension 32 and gear members 34 to pass through the wall and support 3 5, the gears 34 and 43making contact, and extension 32 makingV Contact.

-iloors of thestation, and not until then, the f shaft 8 is free to rotate. The shaft 8 is then actuated by the motor 10 and motion is impartedto the support 29 through shaft 31 -vbeen loosenedsuihciently to clear the extensions 16 of the tank member 12, the weight of the tanks 12 and the cover 13 is shifted tothe arms 28. Rotation of the motor 10 then causes the arms 28 to move downwardly carrying.V with them theentire circuitv interrup= v ter structure, including contact members 23, thereby causing a disconnection between contact members 22 and 23. By this operation it is assured that all parts of a circuit interru ter6 are electrically disconnected.

ownward movement of the arms 28 is continued until the flanges 25a of the cover members 13 bear against the flanges 24. Further downward movement of the cover portion 13 is prevented because of the contact between the flanges 24 and 25a.

Further downward movement of the arms 28 permits the flanges 25 on the tank portions 12 to pass between the flanges 24 until the tanks 12 rest upon the beds 2O of the several litters 7.

The motor 10 is then stopped. The lifters 7 are Withdrawn from between the beams 15 and the tanks are taken to any suitable place Jr'or such repairs as may be needed. The cover members 12 are then accessible for such repairs as may be found necessary.` The Withdrawal of extensions 32 from the'supports 35 permit the latches 44 to fall into the notches 42 thereby preventing rotation of the shaft ,8.

In order to replace a circuitinterrupter, the reverse process is used. The tanks being placed in'position and supported by the several'beds 2() and supports 28. When all the tanks are in place the opposite rotation is given to the'shaft 8 causing the tanks to be raised until contact is made between cover members 13 resting on the flanges 24. Upward movement is then continued until contact members 22 and 23 are brought into contact when extensions 16 are connected with the levers 17 `The supports 2,8 are then freed from .the flanges 25 and the lifters 7 are withdrawn. g L

, By this invention I have provided means for simultaneously opening and removingv the circuit interrupters for all phases of a polyphase electric circuit. 'I also employ a small number of' moving parts with a minimum of floor space.

My invention is not limited to the Specific structure illustrated as it may be variously modified without departing from the spirit and scope of the invention, as set-fortl1 in the appended claims/.f

I claim as my invention:

1. In a -circuit interrupting system for a polyphase circuit, a circuit interrupter for each phase of said electrical circuit, a portable :lifter for each of said circuit interrupters and means common -to all the circuit inter rupters of each electrical circuit for operating said litters and meansfor operating the first mentioned operating means. l

2. In a circuit interrupting system for a polyphase circuit, a circuit interrupter`for each phase of said electrical circuit, a' portable lifter for each of said circuit interrupters, means `common to all the circuit interrupters for operating saidlitters, and

means associated with the first named operating means for preventing its operation until the lifters or'all the circuit interrupters of the electrical circuit are in place.

' 3. In an electrical apparatus, a plurality of circuit interrupters one on each of a plurality of levels, a portable lifter on each level adapted to ,operatively engage said circuit in- -.terrupter thereon and means common to a plurality of levels for simultaneously operating a pluralityrof said lifters to raise or lower the circuit interrupters engaged there- 4f. In an electrical apparatus, a plurality of circuit interrupters, a portable lifter for each of said circuit interrupters, means common to a plurality of said circuit interrupters for simultaneously operating-the associated lifters, and means for preventingl the operation of said common operating means while any one of said liters is out of its operative position.

5. In an electricaldevice, a plurality oi?v circuit interrupters in vertically alined relation, a portable lifter for each of said circuit interrupters, and means common to all of said circuit interrupters for simultaneously operating said lifters. j Y

' 6. I-n an electrical device, a plurality of circuit interrupters in vertically alined relation, a portable lifter for each of said circuit interrupters, means common to all of said cir'- cuit interrupters for simultaneously operatingsaid litters, and a motor in vertical relation to said circuit interrupters for operating said commony operating means.

'7. In an electrical device, a plurality .of circuit'interrupters in vertically alined relation, a portable lifter for each of said circuit interrupters, and means common to all of said vcircuit interrupters for simultaneously op'.-

erating said "litters, a motor in vertical relation to said circuit interrupters for operating said vcommon operating means, and means for preventing the operation of said common operating means until all of said lifters are in their operating positions.

8. In an electrical device, a plurality of circuit interru ters in vertically alined relation, a porta le lifter for each of said circuit interrupters, and a Ashaft common to all of said circuit interrupters for simultaneously operating said lifters. Y Y

9. In an electrical device, a pluralityof cir-VVV Y cuit interrupters in verticallyalined relation, a portable lifter for each of said circuit interrupters, a shaft common to all of said circuit.

interrupters for simultaneouslyl operating said lifters, and a motor in vertical relation tpl sfaid circuit interrupters for operatingsaid s a t;

. .10x-In an electrical device,a plurality of circuit interrupters in vertically alined relatlon, a portable lifter for each of said circuit interrupters, a shaft common to all ofvsaid circuit interrupters for simultaneously oper-V ating said lifters, a motor in vertical relation to said circuit interrupters for operating said shaft, and latching means for preventing the operation of said shaft until all of said litters are in their operating positions.

1l. In combination, a shaft, a support for said shaft, a latch carried by said support, a disk provided with a notch secured to said shaft for engagement with said latch, a second shaft, a bevel gear connection between said shafts, said second named shaft having a detachable connection with said bevel gear, an extension formed on said second named shaft adapted to lift said latch from said notch when said second shaft is in operative lengagement. with said bevel gear.

12. In combination, a tank lifter, a shaft, a support for said shaft, a latch carried by lsaid support, a disk provided with a notch secured to said shaft for engagement with said latch, a second shaft carried by said tank lifter, a bevel gear connection between said shafts, said second named shaft having a de- In testimony whereof, I have hereunto sub-i scribed my name this 8th day of December, 1922. s. l

t CHRISTIAN AALBORG. 

